class A:
    n1 = 300
    n2 = 500
    n3 = 600

    def fly(self):
        print("A-fly()...")

#定义一个B类,继承A类
class B(A):
    n1 = 200
    n2 = 400

    def fly(self):
        print("B..fly()...")



class C(B):
    n1 = 100

    def fly(self):
        print("C-fly()..")

    def say(self):
        print(self.n1)    #100
        print(self.n2)    #400
        print(self.n3)    #600
        print(super().n1) #200
        print(B.n1) #200
        print(C.n1) #100
        #C的fly()
        self.fly()
        A.fly(self)

c = C()
c.say()